>5 years is half of the Ubuntu LTS

No it isn't. Ubuntu LTS is supported for 5 years.

https://ubuntu.com/blog/what-is-an-ubuntu-lts-release

>An Ubuntu LTS is a commitment from Canonical to support and maintain a version of Ubuntu for five years.

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>Not saying it is a bad OS but it is no longer a free Linux operating system with long term support.

Ubuntu LTS is suppored for 5 years, Debian Stable is supported for 5 years, and OpenSUSE Leap is supported 5 years (as far as I can tell - the only documentation I found said "up to" 60 months).

CentOS Stream absolutely provides "long term" support.